Re: Warn when editing read-only files

[Andrew L. Moore]

On 12/11/23 10:12 AM, Antonio Diaz Diaz wrote:
> Andrew L. Moore wrote:
> > Antonio Diaz Diaz <antonio@gnu.org> writes:
> > ] How do you propose to implement such a warning while remaining
> > ] POSIX-compliant?
> >
> > In github.com/slewsys/ed this is implemented by reporting 'Read-only' if
> > ed is in verbose mode:
> >
> > $ ed -v /etc/os-release
> > /etc/os-release: File is read-only
> > 735
>
> I find it less intrusive what is already implemented in GNU ed 
> 1.20-pre3; warn only if trying to modify the buffer:
>
> $ ed /etc/profile
> 2840
> 1d
> /etc/profile: warning: read-only file

Antonio,
I would encourage you to re-read and reflect upon Dan Jacobson's 
observations: the user is best served if informed from the outset.
-AM